Topic
Semiconductor optical gain
About: Semiconductor optical gain is a research topic. Over the lifetime, 5997 publications have been published within this topic receiving 96505 citations.
Papers published on a yearly basis
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TL;DR: In this paper, the authors present the dynamics of quantum-dot passively mode-locked semiconductor lasers under optical injection and discuss the benefits of various configurations of the master source including single, dual, and multiple coherent frequency sources.
Abstract: We present the dynamics of quantum-dot passively mode-locked semiconductor lasers under optical injection. We discuss the benefits of various configurations of the master source including single, dual, and multiple coherent frequency sources. In particular, we demonstrate that optical injection can improve the properties of the slave laser in terms of time-bandwidth product, optical linewidth, and timing jitter.
30 citations
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TL;DR: In this paper, the influence of weak optical feedback on the linewidth of a semiconductor laser was examined and a new relationship was proposed for sensing applications using self-mixing interference.
Abstract: The spectral characteristics of a semiconductor laser are significantly affected by optical feedback in the active cavity of the diode. In this paper, the influence of weak optical feedback on the linewidth is examined and a new relationship proposed. Feedback-induced changes in the power spectral density are also determined by a theoretical analytical model, in good agreements with experiments. These results are then discussed for sensing applications using self-mixing interference, as the maximum range of distance and displacement sensors can be limited by half the coherence length of the laser diode modified by the optical feedback.
30 citations
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TL;DR: A feature associated with continuous-wave two-photon optical gain has been observed in the absorption spectrum of an ensemble of barium atoms driven by a strong near-resonant optical field and a cw optical two- photon laser utilizing this gain appears feasible.
Abstract: A feature associated with continuous-wave two-photon optical gain has been observed in the absorption spectrum of an ensemble of barium atoms driven by a strong near-resonant optical field. In the dressed-atom picture, the observed gain is attributable to inverted two-photon transitions with nearly resonant intermediate states. A cw optical two-photon laser utilizing this gain appears feasible.
30 citations
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TL;DR: In this paper, a Mach-Zehnder interferometer-based all-optical switch with a 10 ps switching window was demonstrated, which requires only 0.65 pJ of control pulse energy.
Abstract: A new type of ultrafast all optical switch based on a Mach–Zehnder interferometer is demonstrated with a 10 ps switching window which requires only 0.65 pJ of control pulse energy. The optical nonlinearity which is utilized is associated with the gain compression of semiconductor optical amplifiers, and the switching turnoff transition does not depend on the slow amplifier recovery time. Both data and control pulses are at the same wavelength of 1.313 μm, and are not polarized orthogonal to each other. The device configuration and the semiconductor amplifiers allow for small scale integration and data output cascadability.
29 citations
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TL;DR: In this paper, a microscopic approach for the computation of semiconductor quantum well laser power spectra is presented, based on nonequilibrium Green's function techniques that allow for a consistent description of the coupled photon and carrier system fully quantum mechanically.
Abstract: A microscopic approach for the computation of semiconductor quantum well laser power spectra is presented.
The theory is based on nonequilibrium Green’s function techniques that allow for a consistent description
of the coupled photon and carrier system fully quantum mechanically. Many-body effects are included
through vertex corrections beyond the random-phase approximation. Band structure engineering is incorporated
in the theory as dictated by the coupled band solutions of the Luttinger Hamiltonian. The influence of the
detailed cavity-mode structure is accounted for by the photon Green’s function. The theory describes the
interplay among the various many-body, quantum-confinement, and band structure effects in the gain medium
and its action as a laser cavity. Numerical results for the recombination rates, optical response, and laser output
power spectra are presented for strained-layer and lattice-matched III-V systems at quasiequilibrium with
variable design and material parameters and under different excitation conditions. Active optical switching is
demonstrated in specially designed structures.
29 citations